Cyclopentanone → HCID 59090746, compound

HRID 29185Notes

Reaction equation

HRID 29185 reaction equation
[CH2:1]([C@H:8]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])[C@H:9]([OH:13])[CH2:10][NH:11][NH2:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:22]1(=O)[CH2:26][CH2:25][CH2:24][CH2:23]1>C(O)(C)C>[CH2:1]([C@H:8]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:18])([CH3:20])[CH3:19])[C@H:9]([OH:13])[CH2:10][NH:11][N:12]=[C:22]1[CH2:26][CH2:25][CH2:24][CH2:23]1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

4

Reactant 2

HCID 8452CyclopentanoneHCID 59090665tert-butyl N-[(1S,2R)-1-benzyl-3-hydrazino-2-hydroxypropyl]carbamate

Product 1

HCID 59090746HCID 59090746, compoundYield 14%

Reagents, catalysts & solvents 1

HCID 3776IsopropanolSolvent

Procedure

A solution of tert-butyl N-[(1S,2R)-1-benzyl-3-hydrazino-2-hydroxypropyl]carbamate (500 mg, 1.695 mmol) in 5 mL of isopropanol under Argon was treated with cyclopentanone (180 μL, 2.034 mmol). After stirring for approximately 18 hours, the reaction solvent was removed in vacuo and the residue was triturated with diethylether. The slurry was filtered and the solid was dried under high vacuum to provide tert-butyl N-[(1S,2R)-1-benzyl-3-(2-cyclopentylidenhydrazino)-2-hydroxypropyl]carbamate (85 mg, 14%) as a white solid. H1-NMR (chloroform-D3) 1.34 (s, 9H), 1.54 (b, 2H), 1.73 (m, 2H), 1.83 (m, 2H), 2.22 (m, 2H), 2.35 (m, 2H), 2.90 (m, 1H), 3.02 (m, 1H), 3.14 (m, 1H), 3.38 (m, 1H), 3.64 (bm, 1H), 3.84 (bm, 1H), 4.52 (m, 1H), 7.25 (m, 5H). MS(APCI): 361(M+Na).

Workup

  1. customthe reaction solvent was removed in vacuo
  2. customthe residue was triturated with diethylether
  3. filtrationThe slurry was filtered
  4. customthe solid was dried under high vacuum

Sources & evidence

ORD record
ord-dc0c7637ad52455c8faa1f088ac154a1
Source dataset
uspto-grants-2008_09
Patent number
US07419967B2

Reaction notes

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